I took the TABE (Test of Adult Basic Education). It was comprised of very basic reading comprehension, writing skills, and arithmetic. If you can read, write, and do math at a middle school level, then you can definitely pass the TABE. However, there are a number of LPN entrance exams floating around out there, such as the TABE, the HESI, the NET, the TEAS, and several others. They all have varying levels of difficulty. You'll need to figure out which one you'll be taking, purchase the corresponding study guide, then take the test after being prepared. Most importantly, don't worry too much, because you seem rather smart.